Portable vernier calipers



FIG. 1 is a perspective view of portable vernier calipers showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left edge view thereof;

FIG. 5 is a right edge view thereof;

FIG. 6 is a top edge view thereof;

FIG. 7 is a bottom edge view thereof; and,

FIG. 8 is a perspective view thereof with the calipers extended. 

The ornamental design for portable vernier calipers, as shown and described. 